On July 21st 2016, the PHP group published PHP 7.0.9.
This is a security release. Several security bugs were fixed in this release, including the HTTP_PROXY issue. All PHP 7.0 users are encouraged to upgrade to this version.
Packages of PHP 7.0.9 are now available for Debian 8 “Jessie” on amd64 and i386 architectures, along with the following PECL extensions : APCu, APCu_bc, geoip, igbinary, imagick, memcached, mongodb, msgpack, redis, ssh2 and xdebug (Careful, PHP 7 support from some of them is still very young!).